Die casting is a process you should consider using in your processing and manufacturing activities. It involves the forceful introduction of metals in a molten state into suitable mould cavities that can shape the liquid metal into something you specifically want. The process happens at customised pressure settings and works well for the fast-paced production of metallic parts in bulk. Additionally, die casting is suitable for making metallic parts that require little to no machining after their production. There are several ways of taking on die casting using any of the following methods:
Cold-Chamber Die-Casting Technique
Cold-chamber die casting involves the manual or automated supply of molten metal into an injection system. The technique eliminates the need for immersing your injection mechanism into a special bath containing molten metal. For this reason, cold-chamber die casting is a less intrusive casting technique because the corrosion of the machines in use remains low compared to other methods.
When you want to cast metals that have a high melting point, then cold-chamber casting is your number-one choice. Such metals include aluminium and its related alloys such as lithium and duralumin. Casting them is a highly corrosive process, and you are better off resorting to a less intrusive and corrosive process.
Hot-Chamber Die-Casting Technique
Hot-chamber die casting also goes by the name gooseneck casting. Unlike the cold-chamber method, you will immerse the injection mechanism into a bath containing molten metal. The die cavity receives molten metal material via a feed mechanism that resembles a gooseneck, which explains the alternative name for this process. One thing you will enjoy when using this technique is fast-paced production and delivery time. Hot-chamber die casting allows quick injection of the molten material.
The hot-chamber method is ideal for casting metals that have a low melting point and relatively high fluidity. Examples here include lead, magnesium, zinc and copper.
When you cast some metals, you need to subject them to post-casting heat treatment. It strengthens your products and enhances other qualities like resistance to corrosion. Vacuum casting takes place in a controlled environment with limited inclusion of gases and low turbulence. The controlled environment is ideal when working on metal combinations that are highly susceptible to contamination. The vacuum ensures limited access by unwanted materials such as water vapour and other gases. On the downside, vacuum die casting is costly compared to other techniques. The need to maintain a controlled environment demands many resources, especially when you take on large-scale production.